Rear Admiral Sir Charles Douglas, 1st Baronet was a descendant of the Earls of Morton and a distinguished British naval officer. He is particularly known for his part in the Battle of the Saintes during the American War of Independence where he helped pioneer the tactic of "breaking the line".

The Battle of the Saintes, also known as the Battle of Dominica, was an important naval battle in the Caribbean between the British and the French that took place 9–12 April 1782. The British victory was considered their greatest over the French during the American Revolutionary War.